多小区MIMO系统中BS节点数增加时的PDKEEPAAA分析
BER Analysis of Multi-Cellular MIMO Systems with Increasing Number of BS Antennas
摘要：
在这项工作中，一个无线通信系统部署了大量的天线在基站（BS），即大规模MIMO系统的显着特点进行了研究。特别是，我们发现了一个简单而有意义的关系，证实了一个基本的假设，在最近的相关作品：根据BS天线的数量$N$增长，其共轭转置的小规模衰落信道矩阵的产品往往是一个缩放的身份，与变化措施成反比的$N$。此外，分析了大规模MIMO系统下行链路的误码率（BER）性能的观点，包括一些现实的不利影响，如来自相邻小区的干扰，信道估计误差，由于背景热噪声，和导频污染，这是最近被证明是唯一的损害，仍然在MIMO多小区系统与无限数量的BS天线。我们的数值结果表明，在相同的方式与总容量，导频污染也限制了BER性能的非合作多小区MIMO系统与无限数量的BS天线。
英文摘要：
In this work, salient characteristics of a wireless communication system deploying a great number of antennas in the base station (BS), namely Massive MIMO system, are investigated. In particular, we found a simple and meaningful relationship that corroborates a fundamental assumption in recent related works: according the number of BS antennas $N$ grows, the product of the small-scale fading channel matrix with its conjugate transpose tends to a scaled identity, with a variability measure inversely proportional to $N$. Furthermore, analysis of the Massive MIMO system downlink is carried out from a bit-error-rate (BER) performance viewpoint, including some realistic adverse effects, such as interference from neighboring cells, channel estimation errors due to background thermal noise, and pilot contamination, which was recently shown to be the only impairment that remains in the MIMO multicell system with infinite number of BS antennas. Our numerical result findings show that, in the same way as with the sum capacity, the pilot contamination also limits the BER performance of a noncooperative multi-cell MIMO system with infinite number of BS antennas.
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